Local Contribution Method for Efficiency of Large Plates  

作　　者：许松林 王惠媛 徐世民 

机构地区：[1]National Engineering Research Center for Distillation Technology, Tianjin University

出　　处：《Chinese Journal of Chemical Engineering》2005年第4期552-555,共4页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No. 20176037)

摘　　要：From the measurement of liquid flow field on a large plate by a hot-film anemometer, three different regions on the large plate were presented, including a liquid circulation area near the inlet down-comer, a region with very slow moving or stagnant liquid on the side of the tray and an active flow region at the center of the plate. According to the contribution of the three regions, the tray efficiency for large plates was proposed. The prediction plate efficiency by the present model are compared with the experimental data in the literature and those calculated by other models. It is shown that the present model is more accurate for prediction of efficiency of large plates, and the calculation is simpler.From the measurement of liquid flow field on a large plate by a hot-film anemometer, three different regions on the large plate were presented, including a liquid circulation area near the inlet down-comer, a region with very slow moving or stagnant liquid on the side of the tray and an active Row region at the center of the plate. According to the contribution of the three regions, the tray efficiency for large plates was proposed. The prediction plate efficiency by the present model are compared with the experimental data in the literature and those calculated by other models. It is shown that the present model is more accurate for prediction of efficiency of large plates, and the calculation is simpler.

关 键 词：plate efficiency large plate liquid flow field 

分 类 号：TQ021[化学工程]